GUI - Display Forms in Panel

This is a major addition. The interface has been modified to only use show the user 1 form.

Features:
* All forms are displayed in a Panel in the main form. This makes the program easier to use as the user does not have to chase pop ups.
* Integration of Encrypt and Decrypt buttons in frmAdd
* Integration of Encrypt and Decrypt forms to set properties
* More consistent GUI
* Add function ReplaceFile in class FileReader
* Window and executable now has an icon. Can be improved later.

The most common button is placed on the left now. This is because it is closer to the list and easier to use.

#### Screenshots:
**Default view**
![gs_000402-10_49_40](https://f.cloud.github.com/assets/5778739/1843461/669c812c-74d2-11e3-994c-25ffc5bfa9ed.png)

**Add File (after file browser dialogue)**
![gs_000403-10_49_49](https://f.cloud.github.com/assets/5778739/1843464/6fc77fae-74d2-11e3-91cc-4c6f7dac6765.png)

**File Added, nothing selected.**
![gs_000404-10_49_55](https://f.cloud.github.com/assets/5778739/1843466/a1a9f222-74d2-11e3-86a8-c79fbfc7789a.png)

**File Added, and now selected. Notice the buttons appearing on the right.**
![gs_000405-10_49_57](https://f.cloud.github.com/assets/5778739/1843471/b250a45e-74d2-11e3-81cf-1a2c57677833.png)

**Encrypt file**
![gs_000406-10_50_07](https://f.cloud.github.com/assets/5778739/1843473/bbf7fe8a-74d2-11e3-818f-5c3ef566f4dd.png)

**Edit file**
![gs_000409-10_50_39](https://f.cloud.github.com/assets/5778739/1843474/c76bbc34-74d2-11e3-861e-95ec58bc944b.png)

**Delete File Confirm**
![gs_000410-10_50_43](https://f.cloud.github.com/assets/5778739/1843477/d3f263fe-74d2-11e3-92d5-b7d106f2ecda.png)